题目

________ the students in this school is about three thousand，and ________ of them are girls． A．A number of；two third                     B．The number of；two thirds C．A number of；two thirds                     D．The number of；two third 答案：B16．京广中心大厦是北京市目前最高的摩天大楼，有209米高，他比中央电视塔约矮196米，你知道中央电视塔有多高吗？